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Command Line Interface
4-140
4
IP ACLs
access-list ip
This command adds an IP access list and enters configuration mode for standard or
extended IP ACLs. Use the no form to remove the specified ACL.
Syntax
[no] access-list ip {standard | extended} acl_name
• standard – Specifies an ACL that filters packets based on the source IP
address.
• extended – Specifies an ACL that filters packets based on the source or
destination IP address, and other more specific criteria.
• acl_name – Name of the ACL. (Maximum length: 16 characters, no
spaces)
Default Setting
None
Command Mode
Global Configuration
Command Usage
• When you create a new ACL or enter configuration mode for an existing ACL,
use the permit or deny command to add new rules to the bottom of the list.
To create an ACL, you must add at least one rule to the list.
• To remove a rule, use the no permit or no deny command followed by the
exact text of a previously configured rule.
• An ACL can contain up to 100 rules.
Example
Table 4-39 IP ACLs
Command Function Mode Page
access-list ip Creates an IP ACL and enters configuration mode GC 4-140
permit, deny Filters packets matching a specified source IP address STD-ACL 4-141
permit, deny Filters packets meeting the specified criteria, including
source and destination IP address, TCP/UDP port number,
and protocol type
EXT-ACL 4-141
show ip access-list Displays the rules for configured IP ACLs PE 4-143
ip access-group Adds a port to an IP ACL IC 4-143
show ip access-group Shows port assignments for IP ACLs PE 4-143
Console(config)#access-list ip standard david
Console(config-std-acl)#